As far as I am aware, using an Arduino to control the LED strips is still legal under the current rules. This was how we did it last year. The cRIO would send commands over two wires (I believe) we had hooked up to the Arduino. This did not use I2C though. We now have I2C communications working between the Arduino and the cRIO (with the Arduino acting as slave of course). Complete info on this very soon (tomorrow I think?).
